Weft detector controlling device



June 23, 1931. A. J. CHEVRETTE WEFT DETECTOR CONTROLLING DEVICE Filed Dec. 28, 1929 2 Sheets-Sheet l June 23, 1931. A. J. CHEVRETTE 1,811,426

WEFT DETECTOR CONTROLLING DEVICE Filed Dec. 28, 1929 Z'Sheets-Sheet 2 'fll EA TQF 62/54/577 Jam P5772 7 77-0 F/VEyLE Patented June 23, 1931 UNITED STATES PATENT OFFICE Aoeos'rnv J; onnvanrrn, or wononsrnn,

MASSACHUSETTS, ASSIGNOR TO CROMPTON .86 KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF T MASSACHUSETTS WEET DETECTOR CONTROLLING DEVICE Application filed December 28, 1929. Serial No. 417,241.

.Thisinvention relates to automatic weft replenishing looms in which substantial exhaustion of weft in the running shuttle is indicated bya 'weft detector. In certain types 5 of weft replenishing looms, the weft detector is at the non-replenishing side of the loom and the indicated shuttle is replenished on the third'pick after indication. The indicated shuttle thus returns once to the weft detecting side of the loom :after indication but before shuttle change or weft replenishment.

- It is the object of my invention to provide improved means to prevent a second indication of weft exhaustion when a shuttle re- 15.turn s.to the detecting side of the loom prior to replenishment or shuttle change. My invention isp articularly applicable to a shuttle changingrloomiof thetype disclosed in my prior Patent No. 1,753,233, issued April 8,

'20 1930, and it is a further object of my inventionto provide means for disabling the Weft l detector when the shifting shuttle boxes are raised for a shuttle change.

My invention further relates to arrange- 25 ments and combinations of parts which will be hereinafter described'and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in which 5 3 Fig. 1 is a front elevation of parts of a shuttie changing loom embodying my improve- ,ments';

Fig. '2 is a sideelevation of certaln p arts, looking in the directionof the arrow 2'in "mechanism, looking inthe direction of the n arrow 5 in Fig. 4; and

Fig. 6 is adetail plan view,.look1ng n the .45""direction of the arrow 6 in Fig. 2.'

Referring tothe drawings, I have shown fportions of a loom frame 10 on which shuttle changing mechanism M is mounted. This mechanism isof the type shown in my prior olpatent and need onlybe'described in a gem eral Way in this application. The mechanism includes regular and auxiliary shuttle boxes indicated generally at 12 and mounted on a lifter rod 13. During normal running of the loom, the boxes are in their lowered position, but are raised after indication of transfer so that a new shuttle will be placed in the upper box and the running shuttle will be received in the lower box, from which it is thereafter discharged.

The-mechanism for actuating the lifter rod 13 is indicated in Figs. 2 and 6 and comprises a lifter lever 15 pivoted at 16 tothe loom frame and having a give-Way connection 17 to the lifter rod 13. A second or actuating lever20 is loosely mounted on the stud or shaft 16 and is provided with a cam roll 21 positioned in the path 22 of a side cam 23. An ofi'set portion 25 of the lever 20 extend below and in front of the lever 15. 1

A latch 27. is pivoted at 28 on a lug 30 projecting outward from the lever 20. The latch 27 normally rests on a shoulder of the lever projection 25 and may be moved under the lever 15 into a slot 32 in the actuating lever 20.

A spring 33 normally holds the latch 27 in the inoperative position indicated in Fig. 6, in which position the actuating lever 20 swings freely and the lifter lever 15 remains at rest. When the latch 27 is moved under the'lever 15, the lever 15, lifter rod 13, and boxes 12 are raised The latch 27 is provided with a downward I projection 35 (Fig. 2) to which a wire or rod 36 (Figs. 1 and 6) is connected. The rod 36 is madeyielding by the introduction of a spring 37 between the ends thereof. The right hand end of the rod 36 is connected .to a bell crank 38 pivoted at 39 on the loom frame 10. v

A link 40 connects the bell crank 38 to a floating lever 41 (Figs. 4 and 5) which is pivoted at 42to the upper end of an actuating .rod or plunger 44.

plunger 44 (Fig. 3) has a give-way connection 45 to a lever 46 which is regularly oscillated by a side cam 4 Under normal conditions, the floating lever 41 swings freely about its pivotal connection I pivot of the the end 5190f the lever and the link 40 is' forcedldownward, moving through a guide 48 to the upper end of the link 40. If, however, the downward movement of the right hand end 190f the lever 41 is prevented, the

lever is thereby transferred to the rod 36 to the right in Fig. 1, and moving the latch 27 to operative position under the lifter lever 15.

If the lever 15 is in the path of the latch,

the spring '87 yields and thelatch 27 snaps under the lever 15 as soon as the latch is moved downward to clea-rthe lever 15. r

The parts thus far described are substantially as shown in my prior patent, to which.

J of the bobbin in the direction of the arrow a Fig. fiend the forwardly extending end of the detector nloves the-.memberQGO from the full line 'to; the dotted line position'in Figs; 4 and 5, in' which 'latter'position the 'm'emberbO underlies the end 49 of the lever 11 and prevents downward-movementthere of. The lever '60, as previouslyd'escribed,"and indicates a shuttle transfer. l 1 i 41 then pivots. on the member In; order to prevent a second indication when the'substantially exhausted shuttleireturns to the weft detecting side of the loom before transfer, I provlde a lever or arm "mounted on afixed pivot 1 an'deng'aging the member .60 whenswung to the right (as viewed Fig.5) member 60 by :ment of the member Such'engagem'e'nt of, the "the member O'prevents move- 60 to the dotted line position in Fig.5 and thus prevents a-second indication ofweft exhaustion; The arm 70 has a laterally pro V ecting portion72' connected to a rod 73'extending down .orbea'ring 745(Fig. 3i)v and normally held upward by a; li ht" Spring .7

encircles strength engaging a collar 76ron said rod. V

At its lower end,the rod73is connected'to a chain 77 passing arounda guide pulley 7-8 and connected by a rod 79 (Fig. 1) to a lever 80 pivoted ona short. shaft-'81" at the left hand side of theloom. spring 82 (Fig. 2)

the ,shaftT8l' and is of sufficient i I to overcome the light spring 7 5 previously described. An arm 84 (Fig.1) "extends under a stud-"85 on thelifter lever 15.

' The weight of the lever, together 'with'the "attac'hedparta'is sufiicientto overcome the spring 82under norm "l'runnmg conditions.

.ment of said member on the return of the When the lifter lever 15 is raised, however, upon indication of weft exhaustion, the stud 85 is removed from engagement with the arm 84, and the spring 82 becomes effective toidepress the rod. and arm 72 and to swing the arm"70 against the member 60,

holding the same lninoperative position I have thus provided simple and effective connections by which the weft detectoris rendered inoperative whenthe shuttle boxes are raised after indication of'weft exhaustion Y and prior to a shuttle change. The provision of such an attachment is extremely desirable to prevent the possibility of repeated and unnecessary shuttle changes. v

'Having thus described my invention and the advantages thereof, 'I do not wish to be limitedto the details herein disclosed, otherwise than as set forth in the claimsflout what Iclaim isz -Q' 1. In a weft replenishing. loom, shifting shuttle boxes at one end of the 100m having a normal running position and a replenishing position, "weft replenishing mechanism associated with said shifting shuttle'boxes, a

weft detecting device at the'other end of'the loom, normally inoperat ve means to shift saidshuttle boxes, said means being rendered ioperativeiby said weft detecting device upon indication of weft exhaustion, and meansto render said weft detecting. device inoperative whenever and so long as saidboxes are re moved from" normal running'position.

2. in a weft, replenishing loom, shifting shuttle boxes at one endof'the' loom having a normal running position and a replenishing position, a weft detecting device at the other end of the loom, normally inoperative means to shift said shuttle boxes lncl'uding a float- .ing lever andanactuator therefor, a member movable into the path of said lever by said detecting device uponindication of weft exto prevent such moveby said detecting device 7 7 shuttle to the detecting side of the loom prior to weft replenishment.

' 3.- In'a weft detecting loom, shifting shuthaustion, and means l t'leboxes at one end of the loom having a normal running position and a replenishing pio-v sjition, a weft. detecting device at theother 'end of theloom, ;therefor, .Ein-g device andE-movable into th Path of said a floating lever, ,an actuator a member engaged by said detectfioating lever;

thereby rendering said lever "operative, and meansto prevent such movement when said boxes are out of normal running position. i i

4'." In-a'loom, a floating" actuating lever, a member movable into-the path of said lever and effective to change thepivotal axis thereof, weft replenishing mechanism, and means controlled thereby effective to prevent-a sec- '-ond movement of said member intothe path of sa1d"leverdi1ring weft replenishment and after said weft replenishing mechanism has received an initial operative movement.

5. In a weft replenishing mechanism, a weft detecting device, disabling means therefor, a set of shifting shuttle boxes at one end of the loom having a normal running position and a replenishing position, weft replenishing mechanism associated with said shifting shuttle boxes, connections by which said disabling mechanism is held inoperative as long as said boxes remain in normal run ning position, and a spring effective to render said disabling mechanism operative when said boxes are moved from normal running 15 position to weft replenishing position.

In testimony whereof I have hereunto affixed my signature.

AUGUSTIN J. GHEVRETTE. 

